Automatic sash-lock.



H. BERMAN.

AUTOMATIC SASH LUCK.

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Patnted July 16, 1918.

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AUToMAfrIc sAsH-Locx.

VSpec'cazitm of Letters Patent.

Patented J Illy 16,1918.

Application filed April 19, 1917. -.Seria1 No. 168,235.

To allV whom t may' concern Be it known that I, HARRY BERMAN, a citizenof the llnited States. residing at Brooklyn, in the county of Kings andState of New York, have invented certain new and useful Improvements inAutomatic Sash- Locks. of which the following is a specification.

The primary aim of this invention is to provide a` simply and durablyconstructed sash lock which will become automatically operative onmovement of the sash or sashes of a window, and it consists in a keepermounted on one sash and a spring projected latch that is releasablysupported in an inoperative position to be engaged. during movement ofthe sash by an obstruction or trip for releasing and allowing the latchto move to an operative position,

The invention further resides in au automatic sash lock which may bemanually operated to lock the sashes in various partiallyopen positionsfor ventilation.

Tn the drawing Figure I is a fragmentary perspective view of a windowembodying the present invention and depicting the latter in aniuoperative position about to be automatically tripped or released formovement to an operative position.

Fig. 2 is a vertical sectional view showing the sash lock inoperative infull lines and operative in dotted lines, and

Fig. 3 is a horizontal section of the sash lock 1n inoperative position.

Referring more in detail to the drawing and using similar numerals ofreference for corresponding parts throughout the several views, 1designates the window frame having the upper sash 2 and the lower sashI, arranged therein for vertical sliding.

ln the inner face of the upper sash and at one side thereof is secured aflat catch plate 4 having a vertical series of openings 5, the upperwalls 6 of whicharc straight while the lower walls 7 are preferablycurved downwardly.

On the top of the lower sash is secured a casing 8 having perforatedbase flanges 9 through which the securing screws 10 are passed. Thiscasing is formed with a latch chamber ll which has its forward end openand its rear end closed by an end wall 12. A latch bolt 13 has itsforward end beveled underneath, as at 14, and is slidabl; disposed inthe casing chamber, a stem l5 eing cari wall .12.

rind bythe bolt.` and guided through the end A coiled spring 1Gcncircles the stem 15 between said end wall and the shoulder 17, formedby said latch bolt, for urging the latter to a projected position.

Rotatably mounted on the free outer end of the stem is a winged head 18and extending from the opposite sides of the wall 12 in parallelrelation is a pair of arms or supports 19 on the outer ends of which thehead 18 is adapted to rest, when the latch is retracted, for retainingthe latter inoperative. Should the head be rotated to disengage itswings from the arms 19 the coiled spring will project the latch and movethe head between said arms as illustrated b v dotted lines in Fig.

ObviouslyT this rotation of the head may be manually accomplished. andsuch is thc preferred operation for locking the sashes partially opened.but to positively insure '.1 locking of the sashes when they are closed,the turning of the head is effected automatically by a trip pin or screwQ0 that is arranged on the frame in the path of the head 18 when thelatter is engaged with the arms. This pin is disposed on the frameslightly above the normal position of the head so as to engage andrelease the latter immediately before the window is closed. Consequentlywhile the head is supported by said arms 19. the sashes may be raisedand lowered without springing the lock. However. as the lower sashapproaches its limit of closing movement the trip pin rotates the headfrom off the arms to permit the coiled spring 1G projecting the lockinto engagement with the catch plate. Thus, when the window is closedthe sashes are automaticallyY locked by a device so arranged as to beinaccessible from outside the window. It is apparent that the element 20may be arranged in different relative positions so as to cause therelease of the latch at the desired time and either in the opening orclosing movement of the sash.

lVhile the foregoing description has been very minute, it is understoodthat in the manufacture of the device such practical changes may beresorted to as fall within the scope of the appended claims.

Having thus described my invention, what` I claim as new is A windowsash lock, comprising a casing closed at its rear end, a spring actuatedbolt mounted therein and having a portion proj eeting through the rearend of the casing, a adapted to be ilnpinged upon movement of headloosely mounted on the rear extremity the sash to turn the headrelatively to the 10 of the projecting portion of the bolt for robolt todisengage the head from the arms tation, the sides of the Casing havingintewhereby the bolt may move into locking pogral extensions formingspaced arms With sition.

the ends of which the rotatable head is en- In testimony whereof I atlixmy signature. gageablo to hold the bolt retracted in the easing, andrelatively stationary means HARRY BERMAN. [11. s]

Copies of this patent may be obtained for ve cents each, by addressingthe Commissioner of Patents, Washington, D. C.

